Extension-bit and washer-cutter



(No Model.)

J. W. COOPER.

EXTENSION BIT AND WASHER GUTTER.

No. 256,979. Patented Apr.,25,1882.

UNITED STATES PATENT OFFICE.

. JOHN w. OOOPER, OE PHILADELPHIA, PENNSYLVANIA.

EXTENSION-BIT AND WASHER-CUTTER.

SPECIFICATION forming part of Letters Patent No. 256,979, dated April 25, 1882.

Application filed September 1, 1881.

(No model.)

T all whom it may concern.-

Beitknown that I, JOHN W. COOPER, a citizen ot' the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Extension-Bits and Washer-Gutter Combinations; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings,

and to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to bits for cutting washers; and it consists in the construction and arrangement of the several parts hereinafter fully described, and pointed out in the claims.

In the drawings, Figure l is a perspective, Fig. 2 a vertical section, and Figs. 3 and 4 are detail views, of parts of my invention.

S is a frame, composed of the hit-shank a, lateral curved arms a a, and head (t (1 is the bit-shank, formed to fit into any ordinary bit-stock.

a. a are two curved wings extending laterally from the lower end of the bit-shank and curved on a common center, so as to form a nearly round ring, as shown. Betweei'i the lower end of these wings a a, I form a head, a which is extended at both ends beyond the edges of the wings to give it a desirable length for holding the cutters. The head has formed through it a central vertical opening, a", arranged in exactline with the bit-shank a.

a a are lateral pendent parallel lugs or flanges projecting downward from the head and forming a channel or way, a between them for holding the cutter-heads.

bis the centering-pin. It is formed with a circular lip or flange, I), an angular shoulder, 11*, and a screw-pin, D The pin b is adapted to pass upward through the centcropening, a while the shoulder abuts against the lower side of the head a and the lip or flange b fits close under the shank of the cutter.

b is the tnumb'nut, which screws onto the upper end of the pin 1) and bears against the upper side of the head a 1) is a threaded pin having its upper end attached to the lower end of the bit-shank, and having its lower end extended downwardto a point near to the upper end of and in line with the pin b when the latter is inserted into the opening a The nut b is run upward on the pin 1) when it is desirable to remove the centering-pin b. The nut I) is thus prevented from getting misplaced, and it is always held in position to be readily run down onto the threaded shank of the centering-pin.

0 represents the head or bar which carries the cutter or cutters. In Fig. 1 I show in dotted lines the ordinary cutter having a single blade at one end. The bar to which the blade is fixed is made so that it slides into the way or channel a and tits snugly between the jaws a a, and it is provided with the central longitudinal slot, 0, into which the angular shoulder 1) of the centering-pin will fit snugly. On one end of the bar 0 there is formed the blade 0 of ordinary shape. On the opposite end of the bar 0, I form the enlargement 0 through which is the vertical opening 0 arranged to hold the shank of a removable cutter and a gage. The removable cutter is held in place by the thumb-screw 0 d is an adjustable cutter, the shank of which is placed in the opening a and made last by the thumb-screw The cutter cl is composed of three cutting edges or blades d d (1 The pendent edges or blades (1 d are parallel with each other and will cut a washer of a given width. The blade d is set to cut horizontally and arranged to split the leather composing the washer cut by the blades (1 d 0 is a'gage, the shank of which is inserted into the same opening with the shank of the cutter d, and is held by the screw 0". It may be adjusted to or from the blade d, so as to gage the thickness of the slice cut oif by said blade.

The circular arms a a. surround or cover the thumb-nut b and they give strength to the po sition of the head a so that I am enabled to make the device lighter than ordinary devices of its class, and at the same time have it equally or even more durable. The nut b is out of the way by being arranged immediately in line with the bit-shank, and is in the most convenient position to be manipulated.

An additional cutter of ordinary shape may be held, as shown in dotted lines, Fig. 1, and two washers may be out in the same operation.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. In a device for cuttingwashers,the combination, substantially as hereinbefore set fort h, of the bit-shank a, the lateral arms a a, extended from the lower end of the bit shank and curved, as shown, the head a formed between the lower ends of the curved arms, and having formed through it the vertical opening to receive the centering-pin, and provided on its structed with the lateral arms a a, curved as shown, and having the head a provided with a vertical opening, a the centeringpin b, and not b, of the pendent screw-shank b arranged as shown and described, and for the purpose set forth.

3. The combination, with the bar 0, constructed with the enlargement c and opening 0, of the cutter d, the gage e, and the set-screw 0 substantially as set forth.

In testimony whereoi'I affix my signature, in presence of two witnesses, on this 22d day of August, 1881.

JOHN W. COOPER.

Witnesses: 7

CYRUS Roosn, SARAH E. COOPER. 

